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  <title>Create an Internet or Unix domain server socket</title>
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  <div id="layout-content"><div id="function.stream-socket-server" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">stream_socket_server</h1>
  <p class="verinfo">(PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">stream_socket_server</span> &mdash; <span class="dc-title">Create an Internet or Unix domain server socket</span></p>

 </div>
 <div class="refsect1 description" id="refsect1-function.stream-socket-server-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>stream_socket_server</strong></span>
    ( <span class="methodparam"><span class="type">string</span> <code class="parameter">$local_socket</code></span>
   [, <span class="methodparam"><span class="type">int</span> <code class="parameter reference">&$errno</code></span>
   [, <span class="methodparam"><span class="type">string</span> <code class="parameter reference">&$errstr</code></span>
   [, <span class="methodparam"><span class="type">int</span> <code class="parameter">$flags</code><span class="initializer"> = STREAM_SERVER_BIND | STREAM_SERVER_LISTEN</span></span>
   [, <span class="methodparam"><span class="type">resource</span> <code class="parameter">$context</code></span>
  ]]]] ) : <span class="type">resource</span></div>

  <p class="para rdfs-comment">
   Creates a stream or datagram socket on the specified
   <code class="parameter">local_socket</code>.    
  </p>
  <p class="para">
   This function only creates a socket, to begin accepting connections
   use <span class="function"><a href="stream_socket_accept.html" class="function">stream_socket_accept()</a></span>.
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-function.stream-socket-server-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>

    
     <dt>
<code class="parameter">local_socket</code></dt>

     <dd>

      <p class="para">
       The type of socket created is determined by the transport specified
       using standard URL formatting: <em>transport://target</em>.
      </p>
      <p class="para">
       For Internet Domain sockets (<strong><code>AF_INET</code></strong>) such as TCP and UDP, the
       <em>target</em> portion of the 
       <code class="parameter">remote_socket</code> parameter should consist of a
       hostname or IP address followed by a colon and a port number.  For
       Unix domain sockets, the <em>target</em> portion should
       point to the socket file on the filesystem.
      </p>
      <p class="para">
       Depending on the environment, Unix domain sockets may not be available.
       A list of available transports can be retrieved using
       <span class="function"><a href="stream_get_transports.html" class="function">stream_get_transports()</a></span>. See
       <a href="transports.html" class="xref">所支持的套接字传输器（Socket Transports）列表</a> for a list of bulitin transports.
      </p>
     </dd>

    
    
     <dt>
<code class="parameter">errno</code></dt>

     <dd>

      <p class="para">
       If the optional <code class="parameter">errno</code> and <code class="parameter">errstr</code>
       arguments are present they will be set to indicate the actual system
       level error that occurred in the system-level <em>socket()</em>,
       <em>bind()</em>, and <em>listen()</em> calls. If
       the value returned in <code class="parameter">errno</code> is 
       <em>0</em> and the function returned <strong><code>FALSE</code></strong>, it is an
       indication that the error occurred before the <em>bind()</em>
       call. This is most likely due to a problem initializing the socket. 
       Note that the <code class="parameter">errno</code> and
       <code class="parameter">errstr</code> arguments will always be passed by reference.
      </p>
     </dd>

    
    
     <dt>
<code class="parameter">errstr</code></dt>

     <dd>

      <p class="para">
       See <code class="parameter">errno</code> description.
      </p>
     </dd>

    
    
     <dt>
<code class="parameter">flags</code></dt>

     <dd>

      <p class="para">
       A bitmask field which may be set to any combination of socket creation
       flags.
      </p>
      <blockquote class="note"><p><strong class="note">Note</strong>: 
       <p class="para">
        For UDP sockets, you must use <strong><code>STREAM_SERVER_BIND</code></strong> as
        the <code class="parameter">flags</code> parameter.
       </p>
      </p></blockquote>
     </dd>

    
    
     <dt>
<code class="parameter">context</code></dt>

     <dd>

      <p class="para">
      </p>
     </dd>

    
   </dl>

  </p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.stream-socket-server-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   Returns the created stream, or <strong><code>FALSE</code></strong> on error.
  </p>
 </div>


 <div class="refsect1 examples" id="refsect1-function.stream-socket-server-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-4842">
    <p><strong>Example #1 Using TCP server sockets</strong></p>
    <div class="example-contents">
<div class="phpcode"><pre><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br />$socket&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">stream_socket_server</span><span style="color: #007700">(</span><span style="color: #DD0000">"tcp://0.0.0.0:8000"</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$errno</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$errstr</span><span style="color: #007700">);<br />if&nbsp;(!</span><span style="color: #0000BB">$socket</span><span style="color: #007700">)&nbsp;{<br />&nbsp;&nbsp;echo&nbsp;</span><span style="color: #DD0000">"</span><span style="color: #0000BB">$errstr</span><span style="color: #DD0000">&nbsp;(</span><span style="color: #0000BB">$errno</span><span style="color: #DD0000">)&lt;br&nbsp;/&gt;\n"</span><span style="color: #007700">;<br />}&nbsp;else&nbsp;{<br />&nbsp;&nbsp;while&nbsp;(</span><span style="color: #0000BB">$conn&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">stream_socket_accept</span><span style="color: #007700">(</span><span style="color: #0000BB">$socket</span><span style="color: #007700">))&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">fwrite</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">'The&nbsp;local&nbsp;time&nbsp;is&nbsp;'&nbsp;</span><span style="color: #007700">.&nbsp;</span><span style="color: #0000BB">date</span><span style="color: #007700">(</span><span style="color: #DD0000">'n/j/Y&nbsp;g:i&nbsp;a'</span><span style="color: #007700">)&nbsp;.&nbsp;</span><span style="color: #DD0000">"\n"</span><span style="color: #007700">);<br />&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">fclose</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn</span><span style="color: #007700">);<br />&nbsp;&nbsp;}<br />&nbsp;&nbsp;</span><span style="color: #0000BB">fclose</span><span style="color: #007700">(</span><span style="color: #0000BB">$socket</span><span style="color: #007700">);<br />}<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</pre></div>
    </div>

   </div>
  </p>
  <p class="para">
   The example below shows how to act as a time server which can respond
   to time queries as shown in an example on <span class="function"><a href="stream_socket_client.html" class="function">stream_socket_client()</a></span>.
   <blockquote class="note"><p><strong class="note">Note</strong>: 
    <span class="simpara">
     Most systems require root access to create a server socket on a port
     below 1024.
    </span>
   </p></blockquote>
   <div class="example" id="stream-notification-callback.example.basic">
    <p><strong>Example #2 Using UDP server sockets</strong></p>
    <div class="example-contents">
<div class="phpcode"><pre><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br />$socket&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">stream_socket_server</span><span style="color: #007700">(</span><span style="color: #DD0000">"udp://127.0.0.1:1113"</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$errno</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$errstr</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">STREAM_SERVER_BIND</span><span style="color: #007700">);<br />if&nbsp;(!</span><span style="color: #0000BB">$socket</span><span style="color: #007700">)&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;die(</span><span style="color: #DD0000">"</span><span style="color: #0000BB">$errstr</span><span style="color: #DD0000">&nbsp;(</span><span style="color: #0000BB">$errno</span><span style="color: #DD0000">)"</span><span style="color: #007700">);<br />}<br /><br />do&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">$pkt&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">stream_socket_recvfrom</span><span style="color: #007700">(</span><span style="color: #0000BB">$socket</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">1</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">0</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$peer</span><span style="color: #007700">);<br />&nbsp;&nbsp;&nbsp;&nbsp;echo&nbsp;</span><span style="color: #DD0000">"</span><span style="color: #0000BB">$peer</span><span style="color: #DD0000">\n"</span><span style="color: #007700">;<br />&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">stream_socket_sendto</span><span style="color: #007700">(</span><span style="color: #0000BB">$socket</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">date</span><span style="color: #007700">(</span><span style="color: #DD0000">"D&nbsp;M&nbsp;j&nbsp;H:i:s&nbsp;Y\r\n"</span><span style="color: #007700">),&nbsp;</span><span style="color: #0000BB">0</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$peer</span><span style="color: #007700">);<br />}&nbsp;while&nbsp;(</span><span style="color: #0000BB">$pkt&nbsp;</span><span style="color: #007700">!==&nbsp;</span><span style="color: #0000BB">false</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</pre></div>
    </div>

   </div>
  </p>
 </div>


 <div class="refsect1 notes" id="refsect1-function.stream-socket-server-notes">
  <h3 class="title">注释</h3>
  <blockquote class="note"><p><strong class="note">Note</strong>: <span class="simpara">当指定数值型的 IPv6
地址（例如 <em>fe80::1</em>）时必须用方括号将 IP 围起来——例如，
<em>tcp://[fe80::1]:80</em>。</span></p></blockquote>
 </div>


 <div class="refsect1 seealso" id="refsect1-function.stream-socket-server-seealso">
  <h3 class="title">参见</h3>
  <ul class="simplelist">
   <li class="member"><span class="function"><a href="stream_socket_client.html" class="function" rel="rdfs-seeAlso">stream_socket_client()</a> - Open Internet or Unix domain socket connection</span></li>
   <li class="member"><span class="function"><a href="stream_set_blocking.html" class="function" rel="rdfs-seeAlso">stream_set_blocking()</a> - 为资源流设置阻塞或者阻塞模式</span></li>
   <li class="member"><span class="function"><a href="stream_set_timeout.html" class="function" rel="rdfs-seeAlso">stream_set_timeout()</a> - Set timeout period on a stream</span></li>
   <li class="member"><span class="function"><a href="fgets.html" class="function" rel="rdfs-seeAlso">fgets()</a> - 从文件指针中读取一行</span></li>
   <li class="member"><span class="function"><a href="fgetss.html" class="function" rel="rdfs-seeAlso">fgetss()</a> - 从文件指针中读取一行并过滤掉 HTML 标记</span></li>
   <li class="member"><span class="function"><a href="fwrite.html" class="function" rel="rdfs-seeAlso">fwrite()</a> - 写入文件（可安全用于二进制文件）</span></li>
   <li class="member"><span class="function"><a href="fclose.html" class="function" rel="rdfs-seeAlso">fclose()</a> - 关闭一个已打开的文件指针</span></li>
   <li class="member"><span class="function"><a href="feof.html" class="function" rel="rdfs-seeAlso">feof()</a> - 测试文件指针是否到了文件结束的位置</span></li>
   <li class="member"><a href="ref.curl.html" class="link">Curl extension</a></li>
  </ul>
 </div>

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